Method of making paper.



P. WESTON. METHOD OF MAKING PAPER. APPLICATION FILED JULY 26, 1911.

1,008,228,. Patenfbd Novf'F, 1911.

2 SHEETS-SHEET 1.

P. WESTON. v METHOD OF MAKING PAPER. APPLICATION rILBI 111L126, 1911.

I 2 SHEETS-SHEET 2.

' I ubzwtoz W MW Patented N0v.7, 1911.

rmmr wns'roiv, or DALTON, MASSACHUSETTS.

METHOD OF MAKING PAPER,

Specification of Letters Patent.

Patented Nov. 7, 1911;

To all whom it may concern:

Be it known that I, PHILIP WESTON, a citizen of the United States,residing at.- Dalton, in the county of Berkshire state of Massachusetts,have invented certain new and useful Improvements in Methods of MakingPaper, of which the following is a description, reference being had tothe accompanying drawing and to the letters and figures of referencemarked thereon.

It is desirable in books employing relatively thick writing paper, such,for in: stance, as ledgers, and whether said books have permanent leavesor detachable ones, that the leaf be made thinner adjacent its bindingline or end, in order that it may be more readil and easily turned inthe open- 7 ing of the book, may lie more flatly when open, and may takeless space or thickness at the bend; and the present invention consistsin a method of decreasing the thickness of a web of paper during itsmanufacture, from the pulp, and in the paper-makin ma-" chine,whereby'the Web may have pro need in it during such manufacture one ormore sections, which shall be thinner than the main parts of the web,and which thin sections shall be so arranged in the Web as -to permitthe web to be subsequently cut into leaves, which shall have such endsections adjacent to the binding edges or portions thereof.

The present invention has been designed particularly for use in themanufacture of paper to be made up into so called loose leaf ledgersheets, although it will be understood that it may not be so restricted.Therefore, the particular finished article which *I illustrate herein isa loose leaf 'ledger sheet, having the marginal edge and body portionjoined by a thin portion, so that the leaf will lie flatin the book.

Before fully describing my invention, it may be desirable to make briefmention of the prior art on this general subject. I-

The operation of making decide-edged paper is old and wellknown, andneed not, be further referred to. It is also old to score or make anarrow groove in paper by the use of a specially constructed dandy roll,So far, however, as methods of nan- -ufacturin paper to be made up intoindependent sheets with the thin edges, for-bindmg, are concerned, theonly method m -use so far as I am aware, isthat ofskiving or Applicationfi1ed-Iuly26, 1911. seal No. (540,716.

grinding down a portion ofthe sheet in its finished state. It. has alsobeen proposed, but so far as I amaware, themethod is not in use,).toplace in juxtaposition to the Fourdrinier or other paper machine, aroll or series of rolls which displace and compress the portions of thematerial brought into contact therewith, thus producing a channel or aseries of channels in the web, the bottoms of which'are thinner than theadjoining portions. Moisture is then ex tracted from the thinportions,preferably by suction, -and the thicker portions are treated andfinished in .the usual manner. In others-words, thatmethod may be saidto consist in subjecting the pulpy mass to the action ofrotary membersby which certain portions aredisplaced andcompressed, and removing moreofthemoisture in proportion fromthe displaced andrcompressed por tionsthan'from the portions adjoining. A

modificationof this'latter methodhas also been proposed,iviz., theheatingof the com-- pressing rolls for the purpose, of removing themoisture; '-Whi le,as I have heretofore said, these methods havebee'nproposed and patents granted thereon, .so far as I .am aware,theyhave not been put into use;

A well definedchannel caused b compression of the material, isobjectiona le, in that it leaves ,a shoulder where the channeled portionis joined ontothe body or higher portion, and; furthermore, as :the pulpin the channel is compressed. only and not removed, it does not leavethe thin portion as-flexible as is desirable.

Myinvention consists'broadly in a method of producing paperofthe'charact'er men- 1 tioned by treating the web while in a pulpy stateon the Fourdrinier or cylinder, with air pressure, either suction-orblast, whereby in the former a-portion ofthe'web in a defined line issucked away, and in the latter a portion is blown. away, or ov.er ontothe ad acent portions of; the web,.thus removing a a portion of the weband leaving a thinned strip or strips. I In a more ,rest rictedsense,the invention consists in the removal of'a portion'of the' thickness ofthe web, alongv certain defined lines by suction applied to such linesofthe web, and finally, 1n the matters hereinafter described and referredto in the appended claimss- The invention is illustrated in theaccomsuction nozzles.

boxes,

Fourdrinier wire 1, arranged to travel in Copies of this patent may beobtained for panying drawings, which are more or less diagrammatic, andin which-- Figure 1 is a side view of a mechanism, adapted for thecarrying out of my method on a Fourdrinier machine; Fig. 2 is a planview of the same; Fig. 3 is a view similar to Fig. 1, showin the methodas applied to a cylinder machine; Fig. 4 is a view; similar to Fig. 2,showing theruse of an'air blast instead ofsuction,"]1ig. 4 is a detailedsec: tion of Fig. 4; Fig; 5 isa view similar 'to Fig. 1, in which thesuction nozzles are arranged over the first'suction box; and Fig. 6 is aview of'a lo'ose leaf ledger sheet made in accordance with my invention.

Before referring specifically to the drawings, it may be stated that thepaper material while in a plastic condition on the movmg Wire of anordinary Fourdrinier papermaking machine, or .while on the cylinder ofanordlnary cylinder machine, is passed beneath the end orends of 'a tubeor tubes or a nozzle or nozzles, which, under thesucking .ion of acentrifugal pump or similar apparatus suck away or remove a portion 0the material in operative juxtaposition to the tube or nozzle, leavingthat portion of the weothinner than the body part outside the sphere ofaction. of the suction nozzles.

The web is then fed over a suction box and treatedin the usual manner,and if desired the web may be passed over a suction box before comingunder the influence of the Instead of suction nozzles or tubes. beingused, air pressure or air blast nozzles may be used, in which event aportion of the webadjacent thereto would be blown away to one side orthe other, leaving the above mentioned thin portion.

It will'be understood that the nozzles may i be arranged as shown inFig. 1, that is, ahead of the first suction box; but it will also beunderstood that the may be arranged in a plane between the. rst andsecond suction or as shown in Fig. 5, maybe arranged over the firstsuction box, in which event the suction of the nozzles would have to beregulated to accord with the suction of the box, the latter acting todraw out the water and draw the pulp against the wire, wlllilile theformer acts to remove some of the P P- Mechanism for carrying-out themethod as shown'in Figs: 1 and 2 consists of the five cents each, byaddressing Washington, D. G."

the direction .indicated by the arrows. A suction pipe 2, with thenozzles 3, leads to a point. in operative proximity to the surface ofthe web, so that when the suction is prop erly regulated by the valves4, a portion of the web will be removed by the action of the centrifugalpump 5, in connection with the pipe 2, drawn through the pump anddischarged into the stuff chest 6.

In Fig. 3, the mechanism used in carrying out the method on a cylinderpaper-making machine is illustrated, a cylinder 1 being used instead ofthe Fourdrinier wire shown in the other figures.

method for removing a portion ofthe'web by the use of air, but insteadof air suction being used, air pressure is utilized." Air-is forcedthrough the nozzles 3 onto the web, and a portion of the web surface inproxim-. ity thereto is blown to one side or the other, thus leaving thethinned portion of the web, the latter being tb reafteroperated upon inthe usual way.

made according to my method, in which the body and marginal binding edgea. and b respectively are of the same'thickness, the thinned portion abeing formed by the removal of material, according to my method.

I do not wish to be limited to the exact manner shown, of applying thesuction or the air blast, as changes may be made without departing fromthe spirit of ,my mvention. I

Having thus described my mventlon, what I claim as new and desire tosecure by Letters Patent, is r 1. The method herein described, ofmanufacturing paper having a thinned portlon, which consists in removingtr'omthe web at the portion to be thinned, some of the material bythereto.

2. The method herein described, of manufacturing paper having a thinnedportlon, which consists in removing from the web at the portion to bethinned, some of the mate-- rial bythe application of suction thereto.

In testimony whereof I aflix my signature, in presence of two witnessesPHILIP wlas'ron'.

: lVitnesses:

A. M. PARKING,

C. L. STURTEVANT.

" i: i=. the 'Commissioner 0! Patents,

30 f l In Fig. 6 is illustrated a form of leaf

